The reaction of the French president is the right thing. It's not like he would be a political prisoner or something. There is a European arrest warrent against him. In Sweden, he would get a fair trial at a european court. If his case even would go to trial.
I think we need to believe in Europe and that also means that we have to accept european arrest warrents. We can also reasonably believe that all EU member states have acceptable standards when it comes to human rights and fair trial.